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build your own
Built To Be Seen
A precision CNC-machined upgrade on a genuine OEM 9C34-8101-AA coolant reservoir cap — factory reliability with engine-bay presence that sets a build apart.
Takes The Heat
Machined from 6061 billet aluminum in a durable satin black powder coat — built for the heat, chemicals and demands of daily driving and performance builds.
Engraving That Lasts
Fiber laser exposes raw aluminum beneath the black coat, so your design is permanent, high-contrast, and never fades or peels.
2007–2014 Mustang
V6, GT, Boss 302 and Shelby GT500 — 3.7L and 4.0L V6, 4.6L and 5.0L V8, GT500 5.4L and 5.8L. Also fits 2003–2004 SVT Cobra and 1996–2000 GT/Cobra 4.6L.
Two Reservoirs, Two Caps
Fits the coolant reservoir and, on supercharged cars, the intercooler reservoir. A Shelby GT500 has both — run a matched pair and the second one is 10% off.
Before You Order
Check the number moulded into your existing cap. It should read 9C34-8101-AA — Ford service number 9C3Z-8101-B, Motorcraft RS-527.
